Book or binder cover



Sept. 17, 1940. c. D. TRUSSEL 2,215,433

BOOK 0R BINDER COVER Filed April 6, 1939 INVENTOR; [larence fl. Tms elq Patented Sept. 17, 1940 U NlTED s AE s PATENT "OFFICE,

Signor to Trussell Manufacturing Company,- v e Poughkeepsie, N. Y., aco'rporation of New York p Application April 6, 1939, Serial No. 266,317

2 Claims.

The invention herein disclosed relates to covers for books or binders, particularly of the type covered in the Trussell Patent 1,887,530 of November 15, 1932.

Special objects of the present invention are to improve covers of the type identified, particularly by stiffening and reinforcing the same, to enable them to withstand more or less rough usage, even though constructed of relatively thin material and to add decorative value and a sense of substantiality and permanence.

Other desirable objects and the novel features by which the purposes of theinvention are attained will appear in the course of the following specification.

The drawing accompanying and forming part of the specification illustrates one practical commercial embodiment of the invention. The structure however may be modified and changed as regards this disclosure all within the true intent and scope of the invention as hereinafter defined. and claimed.

Fig. 1 is a perspective View of a book or binder having the cover of this invention applied there- Fig. 2 is an enlarged plan view of the cover.

Figs. 3 and 4 are further enlarged broken sectional detail views as on lines 33 and 4-4 respectively of Fig. 2.

The cover shown consists of a single sheet of fairly stiif material, folded about the binder or book structure 5, to form the covers I5, and back 1.

The covers have inwardly curved'or rolled marginal portions 8, extending continuously from .or near the back, to and around the corners of the book.

A special feature of the present invention is the provision of the inwardly rounded marginal portions of the cover with longitudinal and transverse embossments such as indicated at 9,

Ill, II.

The longitudinal embossments 9, form a ridge or rib substantially parallel with the edge of the cover and located substantially at the merger of the curved marginal portion into the substantially flat main body portion of the cover.

The transverse embossments Ill, areshown as forming short curved ribs or ridges extending between the marginal edges I2, Fig. 3, and the longitudinal ridges 9.

The other set of transverse embossments II, are shown as extending from near the edges I2, Fig. 4, back through the curved marginal edge portion. and through the longitudinal ridges 9, into the main flat body portion of the cover.

The longitudinal ridge I0, is shown interrupted at points I3, and at these points, transverse ridges I4, are shown extending from the curved marginal portion back beyond the interrupted portions of the longitudinal ridge into the .flat main body portion of the cover.

At the corners diagonally extending ridges are shown at I5, extending from the curved marginal portion back between interrupted corner portions of the longitudinal ridge at I6, into the flat main body portion of the cover. These diagonal corner ridges are shown as terminating between the ends of adjoining transverse ridges I4. twotransverse ridges I4 and intervening diagonal ridge I5, constitute cooperative corner bracing elements. I

Instead of a single diagonal brace I5, at each corner, any number of such bracing elements may be provided, arranged in fanwis'e disposition.

Various materials may be used for the covers, preferably such however that may be readily molded and pressed in the manner indicated. The present invention makes it possible to use relatively inexpensive materials, such as a sheet material of a paper base impregnated with latex while the pulp is in the liquid state. This material is readily molded and, when embossed as illustrated, will hold the desired marginal curvature. The embossments give the curved marginal portion a desirable springy quality, enabling it toyield and to spring back into its original shape. The combination of longitudinal and transverse ridges braces the cover in all directions and gives it a sense of thickness and substantiality, materially enhancing the appearance and feel of the cover as well as actually increasing its durability.

What is claimed is:

l. A book cover, comprising a single sheet of thin, fiat, flexible material with straight edges joined by rounded corners, the marginal edge portions of said thin, fiat, flexible sheet material being inwardly curved transversely of the sheet and continuously along said straight edges and about said rounded corners in a permanently arched condition and a. narrow longitudinal ridge outwardly embossed transversely of the sheet and extending substantially parallel with the edges and about the corners at approximately the,

junction of the curved marginal edge portions with the main body of the flat sheet 'material and said inwardly arched marginal portion and The.

outwardly embossed ridge cooperatively reinforcing each other and jointly forming a relatively stifi frame surrounding, protecting and reinforcing the intermediate area of the sheet material within the outlines of said thus formed frame.

2. A book cover, comprising a single sheet of thin, flat, flexible material with straight edges joined by rounded corners, the marginal edge portions of said thin, flat, flexible sheet material being inwardly curved transversely of the sheet and continuously along said straight edges and about said rounded corners in a permanently arched condition, a narrow longitudinal ridge outwardly embossed transversely of the sheet and extending substantially parallel with the edges and about the corners at approximately the junction of the curved marginal edge portions with the main body of the flat sheet material and said inwardly arched marginal portion and outwardly embossed ridge cooperatively reinforcing each other and jointly forming a relatively stiff frame surrounding, protecting and reinforcing the intermediate area of the sheet material within the outlines of said thus formed frame and additional outwardly embossed narrow ridges at the corner portions of said sheet material extending from said longitudinal ridge outwardly along the inwardly curved rim portion of the sheet material and forming hollow arched trusses between said longitudinal ridge and the edge of the sheet.

CLARENCE D. TRUSSELL. 

